The Datcon 113501 Air Pressure Gauge 0-150 PSI is a DDBI analog gauge that can be operated at 24 volts with a scale range of 0-150 PSI. This front air pressure gauge comes in 52mm gauge diameter with SAE (Step) polished bezel. It is the analog version of the DDBI (Direct Data-Bus Instrument) line that features more precise and accurate measurement.